16667399 has 8 divisors (see below), whose sum is σ = 19437600. Its totient is φ = 14286048.

The previous prime is 16667383. The next prime is 16667411. The reversal of 16667399 is 99376661.

It is a happy number.

It is not a de Polignac number, because 16667399 - 2⁴ = 16667383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16667309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23954 + ... + 24639.

It is an arithmetic number, because the mean of its divisors is an integer number (2429700).

Almost surely, 2^16667399 is an apocalyptic number.

16667399 is a deficient number, since it is larger than the sum of its proper divisors (2770201).

16667399 is an frugal number, since it uses more digits than its factorization.

16667399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48614 (or 48600 counting only the distinct ones).

The product of its digits is 367416, while the sum is 47.

The square root of 16667399 is about 4082.5725958028. The cubic root of 16667399 is about 255.4402187027.

The spelling of 16667399 in words is "sixteen million, six hundred sixty-seven thousand, three hundred ninety-nine".